CINO 680BT Barcode Scanner Replacement Battery BT2100 3.7V 2000mAh

CINO 680BT / F680BT / F780BT — 3.7V Li-ion Replacement Battery (BT2100)

This is a 3.7V Li-ion battery rated at 2000mAh (7.4Wh), replacing OEM part BT2100. It fits the CINO 680BT, F680BT, and F780BT handheld barcode scanners. These models share the same battery bay, connector, and BMS communication protocol, so one pack covers all three.

• 680BT / F680BT / F780BT platform fit: All three scanners run the same 3.7V power rail and use an identical battery connector with matching BMS handshake requirements. A pack that clears BMS initialisation on the 680BT will also clear it on the F680BT and F780BT without modification.
• Bench tested on actual hardware: We cycled this pack through repeated scan-burst sequences and monitored the BMS cutoff thresholds. Under sustained trigger bursts combined with Bluetooth polling, the protection circuit held within spec and did not trip false low-voltage cutoffs.
• First shift preparation: After installing, seat the scanner in its cradle and run a full charge cycle before committing it to pick-and-pack work. Scan trigger inrush current peaks when the cell is near minimum — a fully charged pack prevents the BMS from tripping on the first heavy scan sequence of the shift.

Cradle showing a charging error on a new BT2100 pack

The CINO cradle communicates with the battery over the dock contacts before it begins a charge cycle. If those contacts have oxidation or residue from a previous worn pack, the dock reads elevated contact resistance and flags a charging fault rather than starting the cycle. This is not a pack defect — it is a contact issue. Wipe the battery contacts and the cradle contacts with a dry cloth, reseat the scanner firmly, and the charging indicator should clear within 30 seconds.

Scanner loses Bluetooth connection during rapid back-to-back scans

Each scan trigger pulls a short inrush burst from the cell at the same moment the Bluetooth radio is polling the host. On a degraded or partially charged pack, the combined draw causes a momentary voltage sag that drops below the radio's minimum operating threshold — the wireless link drops and the scanner must re-pair. This is not a radio fault. Charge the pack to 4.2V before the shift and the sag stays within the radio's tolerance. If it persists on a fully charged pack, check the cell voltage under load with a multimeter — a healthy cell should not sag below 3.5V during a burst sequence.